snmpextrespond man page on Ultrix

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snmpext(3n)							   snmpext(3n)

Name
       snmpextregister,	 snmpextgetreq, snmpextrespond, snmpexterror - library
       routines	 available  for	 building  the	Extended  ULTRIX  SNMP	 Agent
       (Extended Agent)

Syntax
       #include <protocols/snmp.h>
       #include <protocols/snmperrs.h>

       struct objident {
	    short     ncmp;	     /* number of components */
	    unsigned long	     cmp[SNMPMXID];/* components */
       };

       struct snmpareg {
	    short     oidtype;	     /* object id type */
	    objident  oid;	     /* object id/*
       };

       struct snmparspdat {
	    short     type;	     /* response data type */
	    short     octets;	     /* number of octets in response data */
	    char      *rspdat;	     /* response data */
       };

       snmpextregister(reg, community)
       struct snmpareg *reg;
       char *community;

       snmpextgetreq(reqoid, reqinst)
       objident *reqoid;
       objident *reqinst;

       snmpextrespond(reqoid, rspinst, rspdat)
       objident *reqoid;
       objident *rspinst;
       struct snmparspdat *rspdat;

       snmpexterror(error)
       long error;

Description
       The  following library routines are available for building the Extended
       Agent:

       snmpextregister
	    Used to register the Extended Agent's Management Information  Base
	    (MIB) to the ULTRIX SNMP Agent (Agent).  The reg parameter is pro‐
	    vided by the caller with the object identifiers to be  registered.
	    The	 community parameter is provided by the caller with the commu‐
	    nity name (a null-terminated string).

	    This library routine waits for a  registration  confirmation  from
	    the Agent.	The process is blocked until the confirmation arrives.
	    When the confirmation arrives, the routine returns the  status  of
	    the registration.

	    The	 program  issues  this	call  before  any  other Extended SNMP
	    Library calls.  It does this because the library routine creates a
	    UNIX domain socket to the Agent on behalf of the caller.

       snmpextgetreq
	    Used  to  receive a request for a MIB variable from the Agent.  If
	    there is no outstanding request from the  Agent,  the  process  is
	    blocked until a request arrives from the Agent.

	    When  the  Extended	 Agent	receives a request from the Agent, the
	    reqoid parameter contains the object identifier for the  requested
	    variable.	The  reqinst  parameter	 contains  the object instance
	    identifier for the requested variable.  If the  request  does  not
	    contains  an  object instance, the reqinst->ncmp record contains a
	    zero.

       snmpextrespond
	    Used to return the requested variable to the  Agent.   The	reqoid
	    parameter  is  the	object	identifier  from the library call. The
	    rspinst parameter is  the  object  instance	 associated  with  the
	    returning  variable.   If  there  is no object instance associated
	    with the returning variable, a null parameter  must	 be  supplied.
	    The rspdat parameter is the returning variable.

	    Note that the Agent maintains a configurable timer for outstanding
	    requests to the Extended Agent.   Therefore,  the  Extended	 Agent
	    must  be  able  to	respond within the Agent's timeout interval in
	    order to prevent a premature timeout in the Agent.

	    See the file for your system's default timeout value.

       snmpexterror
	    Used to return an error to the Agent.  The error parameter is  the
	    error  code to be returned to the Agent.  The error code is one of
	    the following:

	    NOERR—successful SNMP get-next-request end-of-table.  This happens
	    when the requested instance does not exist.

	    NOSUCH—Unknown requested object identifier.

	    GENERRS—Generic error.

	    BADVAL—Bad variable value.

Restrictions
       For  the routine, the object identifier must have the prefix 1.3.6.1 to
       be registered.  If it does not, the registration is rejected.

Return Values
       If an error occurs, a negative value is returned.

Diagnostics
       [BADVERSION]   Bad or obsolete protocol version

       [BINDERR]      Failed to bind the socket

       [GENSUC]	      MIB successfully registered

       [NOSOCK]	      Socket does not exist

       [NOSVC]	      MIB registration was rejected

       [PKTLENERR]    Maximum size message exceeded or community name  is  too
		      large

       [RCV_ERR]      Reception failed

       [SND_ERR]      Transmission failed

Files
       SNMP configuration file

See Also
       snmpd.conf(5n), snmpd(8n), snmpsetup(8n)
       Guide to Network Programming

								   snmpext(3n)
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